64698987 has 8 divisors (see below), whose sum is σ = 87727680. Its totient is φ = 42401480.

The previous prime is 64698983. The next prime is 64698989. The reversal of 64698987 is 78989646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64698987 - 2² = 64698983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64698983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182589 + ... + 182942.

It is an arithmetic number, because the mean of its divisors is an integer number (10965960).

Almost surely, 2^64698987 is an apocalyptic number.

64698987 is a deficient number, since it is larger than the sum of its proper divisors (23028693).

64698987 is a wasteful number, since it uses less digits than its factorization.

64698987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365593.

The product of its digits is 5225472, while the sum is 57.

The square root of 64698987 is about 8043.5680515552. The cubic root of 64698987 is about 401.4509533885.

The spelling of 64698987 in words is "sixty-four million, six hundred ninety-eight thousand, nine hundred eighty-seven".